Fresh data from ratings tracker Nielsen shows an alarming drop in television viewership. ABC, Fox, CBS and NBC have combined for a 9 percent drop in viewers in the coveted 18-to-49 age bracket since the fall season began. Media executives are worried, and rightfully so.

Starting Thursday, Boxee TV will be sold exclusively at 3,000 U.S. Walmart stores. The $98 device features a built-in antenna to grab free over-the-air broadcast TV, and it also tethers to the Internet to stream YouTube, Netflix, and Pandora. Is this a way for you to ditch your cable bill for good?

Google plans to launch a combined service of online and TV program listings and shows, but TV networks are leery of partnering with the search giant. They worry a deal may help Google encroach on their turf.